| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a fuel injection control device controlling a fuel injection device to inject fuel of appropriate quantity in a short period of time even if bubbles are mixed in fuel. <P>SOLUTION: This fuel injection control device controls the fuel injection device including a needle opening and closing an injection hole injecting fuel, a piezoelectric body expanding and contracting according to applied voltage, and an oil tight chamber filled with fuel displacing the needle to open and close the injection hole according to oil pressure changing according to expansion and contraction of the piezoelectric body. The device includes a detection means detecting mixing of the bubbles in the fuel filled in the oil tight chamber provided in the fuel injection device, and a control means changing apply voltage applied to the piezoelectric body to increase displacement velocity of the needle when the detection means detects mixing of the bubbles. Consequently, since apply voltage is changed to increase displacement velocity of the needle when mixing of the bubbles is detected, the fuel injection device is controlled to inject fuel of appropriate quantity in a short period of time even if bubbles are mixed in the fuel. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
